The water pump is located behind the steering yoke. You can see the piston behind the yoke in the attached photo. PM me your email address and I’ll send you the operators manual for your motor. If you are a Facebook user you can download the manual from “The World Needs More ELTO’s” page. I would have posted it here in the archives along with my large collection of manuals, but we don’t allow it for some reason.
Wayne
Upper Canada Chapter
uccaomci.com